#2526 postcascade <index> does not work

[Adrian Robert]

Explicitly calling postcascade to attempt to pop up a menu from the menubar does on work. Tested on OS X 10.5, Tcl/Tk 8.4.7, 8.6a1:

menu .mbar -tearoff 0
. configure -menu .mbar
menu .mbar.apple -tearoff 0
.mbar add cascade -menu .mbar.apple
.mbar.apple add command -label "About Foo" -command { puts "About" }
menu .mbar.file -tearoff 0
.mbar.file add command -label "Dummy" -command { puts "Dummy" }
.mbar add cascade -label "File" -menu .mbar.file

after 5000 { .mbar postcascade 0 }

Nothing happens, and no error is generated.

(The use case for calling this in user code is to simulate platform compliance using bindings, for the following: Command-? activates Help menu, Control-F2 activates Apple menu.)